Benzyl chloride. Benzyl chloride, or Î±-chlorotoluene, is an organic compound with the formula C6H5CH2Cl. This colourless liquid is a reactive organochlorine compound that is a widely used chemical building block.
Two slits are illuminated with red light (Î» = 650 nm). The slits are 0.25 mm apart and the distance to the screen is 1.25 m. What fraction of the maximum intensity on the screen is the intensity measured at a distance 3.0 mm from the central.
procedure: There are two variations of this test, with the lines placed either 15 or 20 meters apart. The 15 m test distance is used for the 2nd and 3rd grade or when there are space limitations. The test involves continuous running between the two lines in time to recorded beeps.